Feedback Amplifier

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Quick Details

Type:Mini Amplifier

Specifications

As the Woodward Driver Amplifer board was phased out, the intermediate stage feedback was still required to properly control

As the Woodward Driver Amplifer board was phased out, the intermediate stage feedback was still required to properly control a proportional valve system. The Feedback Amplifer System was developed to provide this intermediate feedback.

This electronic circuit board takes the distributing valve spool position signal (typically a LVDT voltage) and allows it to be scaled for proper oil system control. The Vout to Vin ratio is typically between 0.25 and 0.75.

While there were a number of different Woodward configurations sold, they all operate using the same basic circuit and features.

The new assembly has been designed tofit in the existing enclosures.

The removable terminal block makesfield wiring and testing easy.

American Governor Company offers a direct replacement for all the configurations. The AGC part Number is AGC-E030819. Some of the Woodward part numbers and boards that the AGC-E030819 replaces are listed below.

Woodward Part Numbers:

Part Number

Description

5453-628

Box Assembly - Feedback Amplifier

5503-222

Feedback Amplifier Board Only

5452-010

Feedback Amplifier

9934-392

Feedback Amplifier Assembly

9934-393

Feedback Amplifier Schematic

3077-870

Base Board for Feedback Amplifier

This is not a comprehensive list because the Woodward part numbers frequently changed. All the assemblies in the field have not yet been identified.